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| Number | Title | Issue Date |
| 8182571 | Frame for receiving a filter element and method for providing A frame for receiving a filter element includes: a pair of first members and a pair of second members. The first members may be arranged alternately with the second members in the assembled orientation to establish a plurality of joining structures between adjoining... | 05/22/2012 |
| 8171352 | HVAC system, a method for determining a source of a reset and a HVAC controller configured for the same An HVAC controller, a method for determining the source of a reset of a HVAC unit and a HVAC system are disclosed herein. In one embodiment, the HVAC controller includes: (1) a power on reset (POR) register configured to indicate if a POR has occurred for said contr... | 05/01/2012 |
| 8157424 | Lamp holder A lamp holder comprising a lamp holder base, a lamp holder housing and a microswitch. In a preferred embodiment, the lamp holder base has a longitudinal axis and an actuator finger coupled to and shielded within the lamp holder base. The lamp holder housing is remov... | 04/17/2012 |
| 8151931 | Acoustic noise control in heating or cooling systems A heating or cooling system comprising a powered fan held in a duct assembly. The powered fan generates acoustic noise when blowing air. The system also comprises an acoustic wave modulator held in the duct assembly. The acoustic wave modulator has one or more fins ... | 04/10/2012 |
| 8123571 | Air conditioning wiring system A wiring system for use in an air conditioning system comprising a printed circuit board having a perimeter and wiring receptacles located proximate the perimeter and wiring connectors. In one aspect, at least some of the wiring receptacles comprise two or more wiri... | 02/28/2012 |
| 8096534 | Water distribution tray A water distribution tray having an improvement including a first downwardly inclined surface therein commencing at a base of a water impingement pedestal within a first of a plurality of channels and ending at a corresponding first of a plurality of discharge apert... | 01/17/2012 |
| D648642 | Thin cover plate for an electronic system controller | 11/15/2011 |
| D648641 | Thin cover plate for an electronic system controller | 11/15/2011 |
| 7959699 | Collapsible filter with folding arms The present invention addresses the need for a collapsible filter that is easily assembled and installed. The collapsible filter comprises top and bottom arms rotatably attached to the top and bottom edges of two end caps. A pleated filter media is provided attached... | 06/14/2011 |
| 7950631 | Water distribution tray A water distribution tray having an improvement comprising a first downwardly inclined surface therein commencing at a base of a water impingement pedestal within a first of a plurality of channels and ending at a corresponding first of a plurality of discharge aper... | 05/31/2011 |
| D638529 | Furnace | 05/24/2011 |
| 7933689 | Method for controlling at least one load connected to a primary and a backup power supply A method for controlling at least one load connected to a primary and a backup power supply having sensor for sensing a voltage on the primary power supply with a first voltage sensor; sensor for sensing a voltage on the backup power supply with a second voltage sen... | 04/26/2011 |
| 7909488 | Lamp holder A lamp holder comprising a lamp holder base, a lamp holder housing and a microswitch. In a preferred embodiment, the lamp holder base is substantially cup-shaped around a longitudinal axis and has an arcuate actuator finger coupled to and shielded within the lamp ho... | 03/22/2011 |
| D633994 | Furnace | 03/08/2011 |
| 7850390 | Frame with self-locking joint A frame is comprised of plural frame members, each of which has plural projections and plural recesses in opposed relationship to the respective projections of the corresponding frame member. The frame is assembled by snapping selected ones of the frame members toge... | 12/14/2010 |
| 7823404 | Air conditioning system with variable condenser reheat and refrigerant flow sequencer A vapor-compression air conditioning system comprising a blower positioned in a return air flow path from a conditioned space, a reheat heat exchanger positioned in the return air flow path and downstream from the blower, a system reversing valve fluidly coupled to ... | 11/02/2010 |
| D623280 | Heating furnace having an ornamental cover plate | 09/07/2010 |
| D619689 | Heating furnace having an ornamental cover plate | 07/13/2010 |
| 7721794 | Fin structure for heat exchanger The invention involves a flat fin heat exchanger configuration 10 with a plurality of louvers 26 that are raised above the plane of the fin 16 between adjacent tube holes 19, 20 that receive tubes 14. Various alternative patterns o... | 05/25/2010 |
| 7720576 | Intelligent auxiliary power supply system with current and temperature monitoring capabilities An intelligent auxiliary power supply system for supplying power to a load such as a furnace or air handler using a rechargeable power source. An intelligent controller determines appropriate periods for switching to auxiliary power, thus allowing the user to realiz... | 05/18/2010 |
| 7706493 | System and method of transmitting data within a three-wire network The present invention is an improvement to previously known systems for controller area networks and the method of communicating across such networks. The system and method introduces interpolated time markers to provide higher resolution bit container, for communic... | 04/27/2010 |
| 7650206 | Apparatus and method for environmentally conditioning a space An apparatus situated in a space for controlling an air terminal device to affect at least one environmental condition in the space includes: (a) at least one sensor unit for presenting at least one sensed indication related with at least one respective environmenta... | 01/19/2010 |
| 7647762 | Combined apparatus for fluid heating and electrical power generation Combined apparatus for heating a fluid and for producing electrical power is comprised of a burner operable to burn a combustible fuel-air mixture to produce gaseous products of combustion; a heat exchanger adapted to receive the products of combustion and to transf... | 01/19/2010 |
| 7351041 | Fan with reduced noise generation Axial flow fan propellers are provided with a roughened portion along the trailing edge of the fan blades on the pressure side of the blade to minimize tonal acoustic emissions generated by laminar boundary layer vortex shedding. The roughened portion may be provide... | 04/01/2008 |
| 6872048 | Fan with reduced noise generation Axial flow fan propellers are provided with a roughened portion along the trailing edge of the fan blades on the pressure side of the blade to minimize tonal acoustic emissions generated by laminar boundary layer vortex shedding. The roughened portion may be provide... | 03/29/2005 |
| 6866474 | Noise reduction by vortex suppression in air flow systems Acoustic vibrations generated by von Karman vortex streets are reduced by shaping members interposed in moving air flowstreams, such as fan guards and grilles used in forced flow air conditioning systems, to have either a cylindrical cross section or a non-cylindric... | 03/15/2005 |
| 6826921 | Air conditioning system with variable condenser reheat for enhanced dehumidification A vapor compression air conditioning system, including a heat pump embodiment, provides enhanced dehumidification of supply air to an enclosed space. The refrigerant fluid circuit includes an evaporator and a reheat heat exchanger for controlling temperature and deh... | 12/07/2004 |
| 6491514 | Furnace burner box assembly with reduced acoustic emissions A burner box assembly for a combustion air furnace includes a back wall, opposed side walls and top and bottom walls defining an interior space for one or more burner nozzles. A combustion air inlet opening is formed in the top wall and is covered by a ge... | 12/10/2002 |
| 6427461 | Space conditioning system with outdoor air and refrigerant heat control of dehumidification of an enclosed space A space conditioning system for controlling the temperature and humidity of air within an enclosed space includes a vapor compression refrigeration unit having a reheat coil disposed downstream of the system evaporator coil to reheat return air after cool... | 08/06/2002 |
| 5749355 | Multi-position furnace with condensing heat exchanger A furnace is adapted for operation in downflow, left horizontal flow and right horizontal flow positions. The furnace includes plural burners, a two-stage heat exchanger, a header box at the heat exchanger outlet for collecting products of combustion from... | 05/12/1998 |
| 5722485 | Louvered fin heat exchanger An improved louvered fin heat exchanger having plural fins arranged in substantially parallel, closely spaced relation and a plurality of heat transfer tubes passing through aligned openings in the fins is disclosed. Each fin includes a plurality of first... | 03/03/1998 |
| 5690470 | Blower housing and apparatus for assembly thereof A housing for an air blower is assembled by providing first and second panels having respective first and second curved edges and a third panel having opposed first and second flanges. The first and second flanges define respective elongated first and sec... | 11/25/1997 |
| 5666889 | Apparatus and method for furnace combustion control Furnace combustion in a multi-stage or variable input furnace is controlled by operating the furnace in a high fire mode at furnace start-up until the temperature of the products of combustion, or a temperature corresponding to the products of combustion,... | 09/16/1997 |
| 5417199 | Heating apparatus convertible for upflow or downflow operation A combustion furnace is provided which is convertible in the field for upflow or downflow operation. The furnace includes a cabinet in which a burner, heat exchanger, air blower and combustion gas blower are located. The burner, heat exchanger and combust... | 05/23/1995 |
| 5377497 | Timed-off control apparatus and method An improved timed-off control apparatus and method are provided to prevent excessive cycling of an electrically operated device, such as an air conditioning compressor. The timed-off control apparatus provides a predetermined timed-off period (e.g., five ... | 01/03/1995 |
| 5367602 | Control apparatus and method for electric heater with external heat source A water heating system, including both a conventional water heater and an external heat source such as a heat pump, is controlled in accordance with the present invention. The water heater includes a water storage tank, an electrically resistive heating e... | 11/22/1994 |
| 5107918 | Electronic thermostat Apparatus and method useful in temperature control system for a predetermined area that employs a user friendly electronic thermostat that can be programmed intuitively and which is impossible to incorrectly program. Further, the electronic thermostat nee... | 04/28/1992 |
| 5074280 | Sectional high efficiency heat exchanger The improved sectional high efficiency heat exchanger of the present invention comprises apparatus for directing hot flue gases backwardly and into a defined lower combustion chamber. Whereupon, such hot flue gases are directed forwardly in the lower comb... | 12/24/1991 |
